In his first-ever interview, the sole Australian survivor of the Waco siege has revealed to 60 Minutes what really took place during the 51-day stand-off, and why he believes crazed cult leader David Koresh will one day return to Earth as the son of God.

Turnbull rejects Brandis 'conspiracy'

Malcolm Turnbull says Labor is spreading "conspiracy theories" over Attorney-General George Brandis' dealings with the West Australian government over the Bell Group.

Labor has accused Senator Brandis of being at the centre of a "kickback scandal" over a reported deal with Western Australia to allow the state, rather than the Australian Tax Office, to claw back $1 billion from Alan Bond's collapsed Bell Group earlier this year.

"The conspiracy theories, the falsehoods that are now being spread by the opposition are all at one with their general approach ... the leader of the opposition cannot be trusted on any matter of fact," Mr Turnbull told parliament on Monday.